With [Harry] and [Dumbledore] watching in the [Pensieve], [Bob Ogden] visits the [Gaunt house] regarding a breach of law and is met with resistance from [Marvolo] and [Morfin Gaunt]. He also watches them mistreat [Marvolo]'s only daughter, [Merope], after they catch her watching the Muggle [Tom Riddle] drive by.

Chapter 11 - "Hermione's Helping Hand" - In which Harry discovers his newfound popularity, learns that Stan Shunpike has been arrested, and holds a frustratingly massive Quidditch tryout that includes a run-in with Cormac McLaggen and Katie, Ginny, and Ron making the team. They visit Hagrid and learn that Aragog is dying, Harry confronts Hermione about having confunded McLaggen during the tryout, and Slughorn invites Harry and Hermione to supper, but Harry is spared having to go when Snape refuses to let him out of detention.

The morning of [Quidditch] tryouts, [Harry], [Ron], and [Hermione] eat breakfast together. There they decide to visit [Hagrid], [Hermione] explains [Harry]'s popularity surge, [Harry] receives his new copy of [Advanced Potion-Making] and swaps its cover with the [Half-Blood Prince]'s book, and they learn [Stan Shunpike] has been arrested.